Supporting QoS monitoring in virtual organisations

There are methods proposed for managing various aspects of quality of service (QoS) in service oriented computing environments, but existing effort tends to adopt a provider-centric perspective, aiming largely at optimising and guaranteeing QoS for service delivery. In this paper, we consider QoS monitoring from a service user's perspective. We describe an approach in which monitoring requirements are expressed as queries in a simple language and are processed against continuously arriving QoS data streams.